Elevator control



Jan. 1, 1924. 1,479,576

c. J. ANDERSON ELEVATOR comm.

Filed Jan. is, 1923 a Sheets-Sheet i MIWHM. "WI

Jan. 1, 9

' c. J. ANDERSON ELEVATOR CONTROL Filed Jan. 19, 1923 3 Sheets-Sheet 2Jan. 1, 1924 1 c. J. ANDERSON ELEVATOR CONTROL Filed Jan. 19, 1923 3Sheets-Sheet 5 5 w Q N M 0? v 0 ofokm. f Qw/ f m Patented Jan. 1, 1924.

CARL J. ANDERSON, F CHICAGQILLINOIS.

ELEVATOR CONTROL.

Application filed January 19, 1923. Serial No. 813,591.

To all whom it may concern:

Be it known that I, CARL J. ANDERSON, a citizenof the United States ofAmerica, and a resident of Chicago, county of Cook, and State'ofIllinois, have invented certain new and useful Improvements in ElevatorControls, of which the following is a specification.

My invention relates to controllers for electrically operated elevators,and has for its object improvement ih such devices.

In the accompanying drawings- Fig. 1 is a front elevation of the device;

Fig. 2 is a section on line 22 of Fig. 1;

Fig. 3 is a partial side elevation;

Fig. 1 is a diagram of a four-floor installation with the elevatorrepresented as standing at the first floor;

Fig. 5 represents the same parts when the elevator is standing at thesecond floor; and

Fig. 6 is a diagram of so muchof the general electrical connections asis necessary to an understanding of the control of the elevator.

The device is secured to, and partly contained in, an open faced box 11which is provided with lugs 12 by which it is secured in the elevatorshaft adjacent to. the elevator moving therein. There isa device likethat of Fig. 1 at each intermediate floor, and a simplified form of thesame device at th top and bottom floors.

Inside of the box 11 is a piece of insulating material 13, and securedthereto near the center is a bracket 14 which is provided with studs 15and 16. Pivoted upon these arearms 17 and 18, each of which is providedwith a contact end 19 and a roller 20. Between the arms 17 and 18, is aspring 21 which acts to press the arms apart and brings their ends 19against studs 22 and 23, which are electrical terminals.

On the extension 24 of box 11 is a stud 25, and on this stud arepivotedlevers 26 and 27 each of which has a cam arm 28 and aroller-carrying arm 29. Between the arms 28 is a. spring 30 which actsto push these arms apart, but t is movement is limited by'the part 31 ononearm engaging part 32 on the other. (Fig. 3.) The extreme distancearms 28 may he moved from each other is that represented. in Fig. 1. Inthis position the arms may be oscillated back and forth on the stud 25,the limits of which oscillation are determined by the levers 26 and 27striking parts on extension 24. In this operation, the levers 26 and 27are sections of a lever pivoted onthe stud 25.

On the arms 28 are cams 34 and 35, and adjacent surfaces 36 which arearcs of circles having the stud 25 for a center. When the levers 26 and27 are in the position shown in Fig. 1, the surface 36 on lever 26 actson roller 20 of arm 17 to hold contact 19 of that arm away from theadjacent electrical terminal 22. The roller 20 on arm 18 being ,freefrom cam 34 and its adjacent surface 36, is pushed by spring 21 so thatits contact end 19 engages terminal 23. When levers 26 and 27 are movedto their other extreme, the cam 34 first engages roller 20 to break theelectrical connection of arm 18, and immediately thereafter cam 35releases its roller 20 so that spring 21 may move arm 17 to electricalconnection with terminal 22. In this, operation there is a briefinterval during whichthe connections are broken to both 22 and 23.

On the arms 29 of lever sections 26 and 27 are rollers 38 and 39, and onthe side of the elevator car is a cam arranged to engage these rollersas the car moves up and down. (Figs. 1, 4 and 5.) This cam is so locatedthat it pushes a roller 38 or 39 to its extreme inward position, and islong enough.

to engage both rollers at the same time as shown in Fig. 5. If we assumethe cam 40 of Fig. 1 to be moving downward in a line parallel with itsface, the said cam holds the roller 38 and then strikes the roller 39,moving it inward on its pivot 25. In this action the spring 30 iscompressedyand cam 34: strikes its roller 20 to move arm 18 so as tobreak electrical connection at 23. If the car stops in this position,the electrical connection is broken at both 22 and 23. But

if the car continues on down, then cam 10 releasesroller 38 and spring30 expands to release arm 17, and spring 21 acting on this I arm makes anew connection at 22.

The arm 17 and roller 38 represent control of the car whenmoving upward,and arm 18 and roller 39 represent control for it when moving downward.As the car comes to the first floor only by moving down ward, and to thetop floor only by moving upward, only one arm and roller are need ed foreach of these places. But for intermediate floors, two arms and rollersneeded as the car comes to these'fioors in both upward and downwardmovements.

The general electrical arrangement is shown in Fig. 6, in which ll, Hand HT represent the lines leading to the source of electrical power,and 100 represents a motor for driving the elevator. The magnet 41serves to connect contact 42 to contact 43, and contact 44 to contact 45for starting the motor 100 in the proper direction to move the elevatorupward. The magnet 46 serves in a similar manner to connect 47 to 48,and 49 to 50, for moving the elevator downward. The magnets 41 and 46may be solenoids for moving levers as shown in my Patent No. 1,318,345,issued October 14, 1919. 51 is a break magnet which need not beconsidered here as it forms no part of the present invention.

The selecting magnets for the different floors are shown at 52, 53, 54and 55 and may be of any convenient construction for making and breakingconnections as will be described. The push buttons in the hall arerepresented by 1 2 3 and 4 The corresponding buttons in. the car arerepresented by 1 2 3 and 4 In Figs. 4, 5 and 6, the arms 17 arerepresented by the letter U to indicate the up ward movement, and thearms 18 are represented by the'letter D to indicate downward elevator.At the same time magnet 54 moves its lever 56 to break the connectionbetween and 66 and remake it between 56 and 66. The currentthen goesfrom 60 to 75, 56, 66 and so on. This shunts the button 3 and holds thecircuit independent of whether the operator holds the button closed ornot. It also shunts the resistance 61;

The connections just described are held during the rise ofthe elevator.When the elevator is arriving at the second floor, the cam 40 firstengages wheel 39 to hold it and then engages wheel 38 to break theconnection of the U-lever at this landing. I But as the circuit was madethru the U-lever of the third floor, this break at the second flooraffects nothing. When the car leaves the second floor it leaves theD-lever in contact with its'adjacent contact terminal, but theU-leverzhas its connection broken. When the carv reaches the thirdfloor, the circuit for magnet 41 is broken at the U-lever for; thisfloor, and this in turn breaks the cir ravaevc cuit for the motor andstops the car, With connections broken at both levers. This condition isshown for the second floor in F i s..5 and 6.

ssuming that the elevator is' standing at the second floor, as in Figs.5 and 6, it

will be evident that pressing the button for the third floor willproduce the same result as before except that the elevator will moveonly the distance from one floor to the next. If the button for the.first floor should be pressed when the elevator is standing at thesecond.floor, then the circuit would go thru the selecting magnet 52,the D-lever of the first floor and the magnet 46 for start ing the motorto move the elevator in the downward direction.

What I claim is:

1. In a device of the class described, two pivoted levers, a'sp'ringacting on said levers so that they normally move as a single lever buteach lever being movable with respect to the other by compression ofsaid spring,

and electrical terminals controlled by the movements of said levers.

2. In a device of the class described, two levers mounted upon a commonpivot, a spring acting on said levers so that they normally move as asingle lever pivoted on its center, said spring being adapted to yieldso that either lever may be moved with respect to the other, andelectrical terminals controlled by the movements of said levers.

3. The combination with an elevator'car, and a cam thereon, of a levercomposed of two'sections mounted upon a common pivot, a yieldingconnection between said sections and serving to cause them to normallyoperate as a single lever on a 'pivot, rollers on said sections engagedby the cam on a passing car, said parts being so arranged that the damwill move one section with respect to" the other and later permit thesecond to move to normal relationship so that the sum of the twomovements will be a reversal of the lever on' its pivot, and electricalconnectlons operated by such movements.

4. The combination with an elevator car, anda cam thereon, of a levercomposed of two sections yieldingly connected together,

a pivot'al'support for .the lever, means by which upon a car passing thelever the cam thereon will cause a movement of the lever sections one ata time so as to leave the lever moved on its pivot tofa new position,and electrical connections controlled by the lever and in turncontrolling the car.

5. The combination with an elevator car,

and a cam thereon, of a lever composed of sections yieldingly connectedtogether, a

pivotal support for the lever, a circuitv clos-- mg device for eachsection, the open or,

closed condition of which device is determined by the position of thesection, and

connection put under strain by the movement of the first section.

6. The combination with an elevator car, a cam thereon, and two contactclosing devices one of which controls the upward movement of the car andthe other of which controls the downward movement thereof, of a levercomposed of two sections each of which controls one of said contactclosing devices, a pivot upon which said sections are independentlymovable, and a spring connecting the sections and serving to hold themnormally in a definite relationship to each other yet adapted to yieldso that either, section may be moved with respect to the other, saidparts being so constructed that upon a car passing a lever the cam willhold one section and then move the other to compress the spring and willi then hold the second and release the firstso that said spring may moveit.

7. In an elevator system, an elevator car and a motor for raising andlowering it thru the distance of several floors, a pair of contactclosing devices at each intermediate floor, one of which devices isalways open and the other closed when the car is at any other floor,connections from the contact closing devices for controlling the motorcircuit, and means operated by the moving car for reversing the open andclosed condition of said contact closing devices as the car passes fromone side of the floor to the other.

8. In a device of the class described, two independently movable contactdevices, a

spring located between said devices and under strain to move them towardclosed posi tion, mechanism arranged to hold one of them always open,means for operating said mechanism to open the closed device and to putfurther strain on said spring, and further means for releasing thepreviously open device so that the spring may close it.

9. In a device of the class described, two independently movable contactclosing devices, a spring located between said devices and under strainto move them toward closed position, a lever havingtwo independentlymovable sections each being provided with means for opening thecorresponding contact closing device, and means by which the sectionsare operated in succession to cause successive movements of the contactclosing devices.

CARL J. ANDERSON.

